The process of classification is selecting outstanding similarities and placing into tribes. Differing tribes are divided in genera (pl.), and genus(sgl.). The last division is known as species.
The genus is capitalized and the species is lower case.
Cattleya Walkeriana (as shown left) These can become quiet different in color that a varietal name will be added such as:
Walkeriana Semi Alba 'Carmela' Cattleya.
classification of plants forming a subdivision of an order and containing a number of genera.
Genus- A group of related plants consisting of one or more species possessing certain common structural characteristics distinct from those of any other group.